feat: 接入 SCDM 优先编辑闭环并支持阵列局部间距

接入 SCDM probe/edit/cache/校验链路，增强孔组、阵列、关系式和参数表交互。

支持阵列相邻段间距、移动意图切换、结果回滚校验，并补充对应回归脚本。

step_editor/model.py

@@ -229,17 +229,34 @@ class StepModel(FeatureMixin, ExportMixin, TransformMixin, OperationMixin, Polyd
     def scdm_local_face_signatures(self) -> list[dict[str, object]]:
         """Return cheap geometry hints used to map SCDM raw objects back to local Face IDs."""
         signatures: list[dict[str, object]] = []
+        face_ordinal_by_solid: dict[int, int] = {}
         for face_id, face in enumerate(self.faces):
             try:
                 surf = BRepAdaptor_Surface(face)
                 surface_type = surf.GetType()
             except Exception:
                 continue
+            solid_id = int(self.face_solid_ids[face_id]) if face_id < len(self.face_solid_ids) else -1
+            part_id = int(self.face_part_ids[face_id]) if face_id < len(self.face_part_ids) else -1
+            face_ordinal = face_ordinal_by_solid.get(solid_id, 0)
+            face_ordinal_by_solid[solid_id] = face_ordinal + 1
             signature: dict[str, object] = {
                 "faceId": int(face_id),
                 "logicalFaceId": self.face_logical_id(face_id),
+                "partId": part_id,
+                "solidId": solid_id,
+                "bodyIndex": solid_id,
+                "faceOrdinal": face_ordinal,
+                "globalFaceOrdinal": int(face_id),
                 "surfaceType": SURFACE_TYPES.get(surface_type, f"type {surface_type}"),
             }
+            try:
+                bounds = _shape_bounds_info(face)
+                signature["bboxMin"] = bounds.get("bbox_min")
+                signature["bboxMax"] = bounds.get("bbox_max")
+                signature["bboxSize"] = bounds.get("bbox_size")
+            except Exception:
+                pass
             try:
                 if surface_type == GeomAbs_Plane:
                     plane = surf.Plane()